A) 201
B) 120
C) 205
D) 435
Correct Answer: C
Solution :
Number of triangles\[{{=}^{12}}{{C}_{3}}{{-}^{3}}{{C}_{3}}{{-}^{4}}{{C}_{3}}{{-}^{5}}{{C}_{3}}\] \[=220-1-4-10\] \[=205\]You need to login to perform this action.
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